Haven't had to change tires on the PacHy yet, but my prior experience with a Focus EV may have similar results. I don't think the increase in diameter matters as much as the tire in regards to mileage. The car came with Michelin Energy Savers and I replaced it with Continental PureContacts and noticed about a 10% decrease in range. I got better dry and wet traction but worse range. If you want to keep high mileage, get LRR tires and read reviews, some are good, some are bad. Usually if you want greater mpgs, you will get less dry and wet traction.
Increasing the diameter of a tire will have a harsher ride, but should handle better. If you want a more comfortable ride, stick with the 17s or 18s. If you want a more sporty ride, get 20s and all seasons or summer tires.
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2018 Chrysler Pacifica Hybrid Touring Plus
2019 Nissan Leaf SL 40kWh